Yarn-spool support



"Patented Aug. 3, 1925.

UNITED STATES PATENT, OFFICE.

WALTER BIXBY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO SHAWMUTENGINEERING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.'

YARN-SPOOL SUPPORT.

Application filed November 6, 1923. Serial No. 673,054.

This invention relates to tube frames, such as are commonly used in tuft weaving AX- minster carpets or similar fabrics, and is particularly concerned with providing a support for the journals of the yarn-spool of a type that is movable laterally to permit withdrawal of the yarn-spool while normally maintained in operative position for supporting the spool, without endwise pressure on the spool. I

The particular application of the present improvement, in the form illustrated in the drawings, is to the middle or intermediate bearing member of the tube frame yarnspool which is made in two or more sections placed end to end with their adjacent journals interlocked in any suitable we'll-known manner to secure uniformity of location of the several sections.

Generally speaking the invention comprises a supporting base member on which is fulcrumed a bearing arm provided atits free end with a journal bearing and at its fulcral end with stop members disposed on opposite sides. of the fulcral aXis, and engaged by the spring which, by equal pressure on both stop members, acts to maintain the bearing arm in operative position while allowing said bearing arm to be swung to either side to effect disengagement be tween the bearing and its contained journal when removing the spool. Since the bearing arm, although normally maintained in operative position, can yield in either direction for the purpose of inserting or removing the spool sections, the same construction may be used on either a right hand or a left hand construction.

- These and-other features of the invention will beexplained in the following specification and will be defined in the claims hereto annexed.

In the accompanying drawings I have illustrated the tube frameequipped with my aforesaid improvements, in whichi Figure I1 is a front elevation of a tube frame having a two-part spool provided with my improved spool-supporting member.

Figure 2 is aflplan view of the pivotal bearing arm and its base. I

Figure 8 is a detail thereof in central vertical section. V 1

Figure 4 is a front elevation-with one portion of the bearing armshown in cross section. 1 L

Figure 5 is an end elevation of the bearing member and base. V

Figure 6 1s a detail view showing 1n cross section a modified construction of stop meme her for the brake arm.

Figure 7 is an end elevation of the bear ing arm containing the modified construetion shown in Figure 5.

In the practlce of my nvention, according to the form illustrated in the drawings,

the general tube frame construction is'of the usual type and embraces a carrier bar 1, to the side of-which is secured the tuft-guiding tubes or quills 1 said carrier bar being supthese spool arms 4, while theyinner journals of the yarn-spools are supported in an intermediate bearing member 8 which, in this case, comprises a pair of pressed steel arms formed with registering bearing apertures whose edges are outwardly turned to form shallow, aligned flanges 9 which form bearing seats'for the adjacent journals 5, of the two spool sections which are of usual well known construction. I

The intermediate bearing arm or spoolsupport 8, is fulcrumed on a fulcral pin 12, which is mounted in a strap-like or base member 18, whose middle portion is formed into an upwardly projecting loop 14 to receive and support the ends of the fulcral pin 12. The central portion of the base member 13 is cut out to form an elongated aperture or slot, as shown at 13*, of slightly g-eater width than the flat spring 15 which is placed over said opening to overlap the end edges of said opening, the ends of the spring being of suflicientlength to pass beneath the heads of the fastening screws 14 which attach the basel3 to the top of thecarrier bar 1.

At their lower ends the similar plates forming the bearing arm 8, are cutand bent to' form hinged eyes or loops l0, embracing the fulcral pin 12 adjacent to the pin-supporting eyes 14, while theintermediate end portions between these loops forming the eyes 10,.are carried downward astride of the III fulcral pin 1-2, as shownat 11 in Figure 3, their ends-being: proportioned to'abut against the surface of the flat spring 15 so as topress. firmly against said spring. which acts with equal" pressure on both stop members If to normally maintain thefbearing arm in vertical operative position for supporting the ad acent ournals 5, of the spool sections, while allowing the b'e'ari'ngi'arm 8 to be:

swung to either side, the spring yielding sufliciently. to allow such movement endwise of the spool, while acting; to automatically return the bearing arm to operative position, when the arm is swung: a short distance from perpendicular or operative position, owi n'g to the fact that in such oblique is bent around the fulcral pin and extended in parallelism with the plane of the spring 15 to form separate stop members which may beof any suitable lengthpTlie intermediate" portion 21- of the other member of the arm '8' islilrewise bent around the adjacent side of thefu lcral arm, and extended in parallelism with the fleafspring 15, to forma stop member on the opposite side of the fulcral axis. These two looped tongues or hinge members combined form a closed eye or.bearin g receiving fulcral pin, and provide, on opposite sides of the 'fulcral axis, stopnrembers having engagement with the-yielding spring 15, each-of which-actsin a direct-ionopposite the other, and both actin g normally to maintain the bearing arm in operative position. I

One great advantage resulting from this construction and arrangement of the intermediate spool bearing arm istha't it permits the arm to be laid flat in substantialparallei-ism with the top of theca'rrier bar when the tube frame is being. threadech'thus affording no obstruction to thosetuft elements or threads which come opposite the intermediate bearing member. Hence the'thr'eading needles can pass through. directly to, engage the clamp-held thread ends for the threading operationwithout any interference or'obstruction.

What I claim is:' V v 1'. A bearing support for tubevilframe yarn-spool embracing in combination, a base member securedto the frame and affording a'fulcral support, a bearingarm fulcrumed to swing thereon and formed at its free -V end wit]. a journal-receiving bearingaperture, the lower end of said being provided: with stop members on. opposite sides of the central axis disposed to engage a leaf spring arranged to exert counter-balancing rot'at'ive pressure on each stop member in opposite directions whenthe bearing arm is in operative position, substantially as described.

2,.-A. bearing support for the yarn spool of a tube-frame embracing in combination, a supporting. base, a bearing arm ful'crumed thereon said armbeing. provided at its free end with a bearing for the reception of the yarn-spool journal, andat its fulcral end with stop members disposed om opposite sides of its fulcralaxi s,a; fiat spring; mounted on the base to oppose a yielding. pressure against said step members'and thereby maintain the arm yieldingliy in; operative-position, substantially as described.

3; A hearing support for the yarn spool of a tube-frame embracing, in combination a bearing arm pivotally mounted on the frame and provided 5 with a journal-bearing orifice at its free end andits other end projectingbeyond and bestridingvthe pivotal axis, and a spring mounted on the frame adjacent to the pivotal axis in position to engage the bestriding portions of the hearing arm on opposite sides of the axis and exert a yielding. pressure tending to maintain the arm in. proper operative position without exerting endwise pressure: against the spool, substantially as described.

- 4. A hearing support for the yarn spool of a tube frame embracing in combination a base adapted to be secured tothe carrier bar of a tube-frame and having'eyes for supporting a pin, an axial fulcral pin inserted in said eyes, aleaf spring extending between said eyes beneath said pin, a bearing arm pivot ally supported on said pi-n and. provided at its freefend with a bearing for receiving adjacent spool journals, saidarms being provided with stopm-embersarranged to engage said leaf spring and receive the thrust thereof on opposite sidesof the fulcral axis, substantially as described. l

51 A bearing support for the yarn spool of a tube frame, embracing in'itsconstructiona bearing arm comprising two, faces to face, members secured together, each having a'tflange-bordered opening in alignment with a similar opening in the otherl'to form :a journal-bearing, means for pivotally supporting said bearing arm on the tube frame carrier bar, and a spring mounted to exert a yieldingrthrust onieach member tending to produce rotation'of each member inopposition to the other to normally maintain the bearing arm underpb'alanced pressure in operative position to support adjacent journals of a yarn spool, substantially as described.

6."In a,tube frame for'tuft weaving, the combination with a tube-carrying barxand it overhead yarn spool comprising longitudinal spool sections arranged end to end, of

an intermediate spool-supporting arm pro vided with a spool-jouroal earing at its free end and pivotally mounted on said carrier bar to project between the adjacent heads of two spoolsections, said arm being yieldingly maintained in normal operative position under spring tension against movement toward either spool head while capable of moving to either side to release the spool journal, substantially as described.

7 In a tube frame for tuft weaving, the combination of a carrier bar and its opposite end brackets for supporting the outside journals of a yarn-spool, an intermediatebearing arm arranged to afford bearing support for intermediate spool journals and arranged to swing into substantial parallelism with the top of the carrier bar for the purpose of facilitating the threading of the tubes, substantially as described.

8. In a tube frame for tuft weaving, the

ingly maintaining said intermediate bearing arm in either of these two positions as may be desired, substantially as described.

9. In a tube frame for weaving, the combination with a carrier-bar and its end brackets provided with bearings for supporting a yarn-spoohan intermediate bearing arm mounted to normally support two adj acent journals of sections of the spool, said arm being movable from normal spool-supporting position to a position out of the path of threading needle during the tube-threading operation, substantially as described.

In witness whereof, I have subscribed the above specification. 7

i WALTER BIXBY. 

